CONCLUSION: P300 potential can be used as an index to assess the cognition of gastrointestinal cancer patients.

结论：P 300电位可作为消化道恶性肿瘤患者的认知状况的评价指标。

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Methods:The index potential years of life lost (PYLL) and rate of PYLL were used to analyze the cancer death data of all death survey from 1990-1992 in Shandong province.

方法：利用减寿年数和减寿率分析指标对山东省1990～ 1992年全死因调查中的肿瘤死亡资料进行分析。

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